Once ALM has been initiated, and Deployed mode is turned on, the Production model should NEVER be taken out of Deployed mode
6.03-01a Development Model creation - When copying a Production model to create the initial ALM environment, or when re-creating the DEV model as part of a “reset”
6.03-01b There are no other exceptions! - It is just not worth it. ALM brings control, but there are rules, and Deployed mode is the key rule
Best Practice article:
Questions on this topic? See 6.03-01 Don't take the model out of deployed mode in our Planual forum.
ALM Explained—Part 1: Compatibility